The Sum Of Two Numbers Is 20 And Their Difference Is 4
The problem given says that 2 unknown numbers are given, whose sum is equal to 20 and the difference is 4. Let's find the two numbers :When we add the two numbers :
X + Y = 20
The difference of two numbers :
X - Y = 4
Solution :
If we add the two equations eachother , then we can find the first number.
|
X + Y = 20 X - Y = 4 2X = 24 |
Let's divide 24 to 2 for the first number "X" .
X/2 = 12
First number is 12
X + Y = 20
So ;
12 + Y = 20
Y = 20 - 12
Y = 8
Second number is 8
Question & Answer
The Sum Of Two Numbers Is 20 And Their Difference Is 4 : 12 And 8